Slow-opening valve



June 18, 1935. w RAY 2,005,266

I SLOW OPENING VALVE Filed NOV. 13, 1933 4/ a; fi

' INVENTOR. W/LL/AMA.EAY' 5 ATTORNEY Patented June 18, 1935 A A Q UNITED STATES PATENT ore-ice SLOW-OPENING. VALVE William A. Ray, San Francisco, Calif., alsignor to Gieneral Controls Co a corporation of Calie forn a Application November 13, 1933, Serial No. 697,797

'4' Claims. (01, 137-139) This invention relates to a control valve, partween, "by screws 20. The diaphragm I 9 is seticularly a valve of the slow opening type utilized cured between plates II and 2 2 by a screw 23 which to control gas now to a furnace. engages rod 24., The rod 24 is engaged with pis- It is an object of the invention to provide a n l3,by a pin 2 B tha t di ph m 0811 control valve, 'the speed of operation 1 which move the piston and the valve member i2 carried 5 can be controlled by means independent of the therebyh di phr m nd its chamber are in valve structure. ellect 8 Cylinder and piston. I

Another object of the invention is to provide a m th l t is admi t d o d phr m an improved valve of the character described. chamber 16 by passing w ent pis n 3 an 10 Another object of the invention is to provide a cylinder d then through restricted p s 10 s now control system enabling furnace opera- 21 11 1 the section '1. Gas passes t0 the diaphragm t be improved; In controlling gas fl w to section l8 through restricted passages 28 in the a furnace, however, it is desirable that, when the rod 24 and another m s e 39 in e s w"- furnace is started into operation, the rate of gas To Protect against material (meeting m the 5 l5 flow to the burner be increased gradually to a h ehtehlhg the passages a skirt 13 1 15 maximum i becau e a cold furna e sltioned On the end 0! rOd and the plate draft conditionsoften are very-unfavorable. By shields the Passages u t Valve when not starting with a small gsfs'fiow the proper draft h is placed its sideis created-and, by the time the valve has opened A plug a is screwed mm section and to permit f ll gas flow, the furnace or fire box is vides a seat fora valve member 33 movable to conunder the proper (1mm Thevalveand system trol flow out of section II, through outlet 34 and have been used with success on natural gas fired pipe wmch extends the furnace- The furnace, and although not limited this use, member 33 is operated by a suitable device as the Wm be described in this connection solenoid 31, which, when actuated, serves to con- 5 A further object of the invention is to provide tr 01 Opening and closing movement qf'member a valve which is of a simple and rugged construc- 2 to ggg z': that m H n tion. Particularly adapted for manufacture. m the zf i'g ha "gauge on z g g The invention possesses numerous other advanm di hr Images gg; r ur tageous features and objects, some of which, toe d 2 2 e gether'with the foregoing, will appear at length can a so he u an urges mem er in the following wherein the present preferred 2 fig:g sgs gz gg f ig g g z$213238;

form of my invention is disclosed.

, ncid, pressure in section vvll drops so that the In drawing the single View shws "W higher pressure inthe section I! can move the-diapartly in section, in conjunction with other diahm m ward-1y tom, ton However edpartsofmysystem. 8 up D this raising movement is at a slow rate due to the A valve body structure 8 is included between restricted me about the piston and through gas inlet line land gas outlet line 8 which extends n. h 1 to burner 3'--in furnace iii. A -member II is A valve a is included in liner. usually being 40 screwed into the body 6 to provide a valve seat screwed into outlet ;4 m, valve jg-pdjustable, 40 and a passage through which flow can occur from usually a t t m of opening 01 the inlet to the outlet. cooperatively adjacent to minnow "lye be i p-1 d valve s seat member I I is annular member, [2 which is trolling: the tg g 1 m t dumber, movable to and fro, to seat against seat II or d, c nsequently, the rapidity with which the permit flow. This annular membenis made f diaphragm rises'when valve member is raised. 45 rubber orfothersuitable material and is carried Passages 28 and 20 to the chamber I! restrict by piston I3 to whichit is secured by a plug l5 flow past the diaphragm to the extent necesscrewed into the piston. Piston l2 has a loose sary to ensure that the diaphragm can raise fit in cylinder H which is provided as a sliirt' on the piston i3 against the pressure thereon while flange l6 positioned and secured/"oh thebody 3 by, permitting sumcient flow to take place to en- 50 studs (not shown). 5 sure that the valve will not open quickly. A diaphragm chamber formed by lower section e line 33 extends to the furnace it so that Wand upper section i8 is rovided, section ll bethe small amount which passes therethrough is ing screwed intoflange IS. The two sections are burned. It is only when the main valve is open held together with a flexible diaphragm isv beand primary M occurs thrownfses'i and a that the secondary control flow takes place in line 36.

To ensure that the valve can be opened even. if the device 31 can not be actuated to raise valve member 33, threaded rod 39 is extended through plug 4| in the valve body to engage plug l5. "When cap 42 is removed from the plug, the rod can be turned so as to engage the plug and raise the valve off the seat.

I claim: v

l. A device of the character described comprising a valve body including a valve seat and a cylinder in said body, a piston fitting loosely in said cylinder and carrying a valve member cooperatingwith said seat, a diaphragm chamber mounted on said body and including a flexible member, a member connecting said flexible member and said piston, a conduit tor passing fluid leaking past said piston to one side of said flexible member in said chamber, and a passage to the other side of said flexible member in said diaphragm chamber.

2. A device of the character described comprising a valve body including a valve seat and a cylinder in said body, a piston fitting loosely in said cylinder and carrying a valve member cooperating with said seat, a diaphragm chamber mounted on said body and including a flexible member, a member connecting said flexible mem-' ber andsaid piston, a conduit for passing fluid leaking past said piston to one side of said flexible member in said chamber, a passage to the other side of said flexible member in'said. diaphragm chamber, an outlet from said other side of said chamber, and means for controlling fluid passage through said outlet. I

3. A device of the character described comprising a valve body including a valve seat and a cylinder in said body, a piston fitting loosely in said cylinder and carrying a valve member cooperating with said seat, a diaphragm chamber mounted on said body and including a flexible member, a member connecting said flexible member and said piston, a conduit for passing fluid leaking past said piston to one side of said flexible member in said chamber, a passage to the other side of said flexible member in said diaphragm chamber, an outlet from said other side of said chamber, means for controlling fluid passage through said outlet, and means for varying the rate of fluid passage through said outlet.

4. A device of the character described comprising a valve body including a valve seat and a cylinder in said body, a. piston fitting loosely in said cylinder and carrying a valve member cooperating with said seat, a diaphragm chamber mounted on said body and including a flexible member, a member connecting said flexible member and said piston, a conduit for passing fluid leaking past said piston to one side of said flexible member in said chamber, a passage to the other side of said flexible member in said diaphragm chamber, and a skirt partially surrounding said passage. 1

WILLIAM A. RAY. 

